It's not that hard at all. There's a waiting list however as the U.S. only wants to let a million people in per year. These illegals feel that they are too special to wait and do it the right way. There are some other things like being sponsored by a family member who is already a citizen, learning the language and history of the U.S. and then taking the test when your number is called. All that preparation could be done while waiting to be called. There are also worker's visas so that they can work while waiting but again, they'd rather just work and forget the legal way of becoming a citizen. Oh and grab all the benefits they can as well.
Karl
